A.O. Smith VB/VW-500 - Manual (Page 16)

16
FIGURE 12. DIRECT VENT HORIZONTAL.
FIGURE 12A. DIRECT VENT VERTICAL.
CAUTION
Direct venting into dead air spaces such as;
alleys, atriums and inside corners can cause
recirculation of flue gases. Recirculation of
flue gases will cause sooting, premature
failure of the heat exchanger and icing of
the combustion air intake during severe cold
weather. To prevent the recirculation of flue
gases, maintain as much distance as
possible between the combustion air intake
and the exhaust vent terminal.
NOTES: If the exhaust vent terminal is within
10’ (3.0m) of a wall or parapet, it must
extend a minimum of 2’ (610mm) above
the wall or parapet.
Joints are not joined to show vent pipe
orientation.
NOTE: Joints are not joined to show
vent pipe orientation.
CAUTION
Direct venting into dead air spaces such as alleys, atriums,
and inside corners can cause recirculation of flue gases.
Recirculation of flue gases will cause sooting, premature
failure of the heat exchanger and icing of the combustion
air intake during severe cold weather. To prevent the
recirculation of flue gases, maintain as much distance as
possible between the combustion air intake and the
exhaust vent terminal.